The smile is because each character only has like 5 pngs they can use.
For context though, the other kingdom that isn’t exactly friends with Askr, had a coup, where the villain overthrows, kidnaps, and plans to execute Veronica the heir to the throne. Whose been trying to keep the peace between Askr and Emblea.
The villain puts Alfonse’s order of heroes in a bind by basically saying if they don’t surrender and die, she’ll use the gods powers to kill everyone in Askr. If they resist, they still die.
So Alfonse realizes he has to put on the act of a psychopath to leverage the situation. Saying how how doesn’t care about his people because at the end of the day, their deaths aren’t his death. He tells Letizza( the villain) how he murdered his own father because he was in their way and how it doesn’t matter what she does, he’s going to kill her to.
She’s taken aback but how much of a personality change he had and resonates with Alfonse, allowing the order of heroes to press on for now as she retreats.